Problems with the use of ADC at low power

[supper xie]

Hi, everyone,

I am pretty new to nRF52 development. Right now,I want to turn SAADC off at low power and turn it back on when wake up, but after  nrfx_saadc_uninit();When I use user_adc_init() again, the SAADC state is always busy.

[supper xie]

void user_adc_init(void)
{
	ret_code_t errCode;
	user_adc_enable();
    nrf_saadc_channel_config_t channel_config =
        NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_AIN3);

    errCode = nrf_drv_saadc_init(NULL, saadc_callback);
    APP_ERROR_CHECK(errCode);

    errCode = nrf_drv_saadc_channel_init(3, &channel_config);
    APP_ERROR_CHECK(errCode);


	errCode = nrf_drv_saadc_buffer_convert(m_buffer_pool, 1);
    APP_ERROR_CHECK(errCode);


}

void saadc_callback(nrf_drv_saadc_evt_t const * p_event)
{
	float adcval;
	ret_code_t err_code;
    if (p_event->type == NRF_DRV_SAADC_EVT_DONE)
    {
        ret_code_t err_code;

        err_code = nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer, 1);
        APP_ERROR_CHECK(err_code);
			adcval = (float)p_event->data.done.p_buffer[0]*3.6;
    }
}

void user_adc_read(void)
{
	ret_code_t errCode;
	errCode = nrf_drv_saadc_sample();
	APP_ERROR_CHECK(errCode);
}